Crystal Structure of MAPKAP2

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 

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This is version 1.6 of the entry. See complete history


Structure of Mitogen-activated Protein Kinase-activated Protein (MAPKAP) Kinase 2 Suggests a Bifunctional Switch That Couples Kinase Activation with Nuclear Export

Meng, W.Swenson, L.L.Fitzgibbon, M.J.Hayakawa, K.Ter Haar, E.Behrens, A.E.Fulghum, J.R.Lippke, J.A.

(2002) J Biol Chem 277: 37401-37405

  • DOI: https://doi.org/10.1074/jbc.C200418200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    MAPK-activated protein kinase 2 (MAPKAPK2), one of several kinases directly phosphorylated and activated by p38 MAPK, plays a central role in the inflammatory response. The activated MAPKAPK2 phosphorylates its nuclear targets CREB/ATF1, serum response factor, and E2A protein E47 and its cytoplasmic targets HSP25/27, LSP-1, 5-lipoxygenase, glycogen synthase, and tyrosine hydroxylase. The crystal structure of unphosphorylated MAPKAPK2, determined at 2.8 A resolution, includes the kinase domain and the C-terminal regulatory domain. Although the protein is inactive, the kinase domain adopts an active conformation with aspartate 366 mimicking the missing phosphorylated threonine 222 in the activation loop. The C-terminal regulatory domain forms a helix-turn-helix plus a long strand. Phosphorylation of threonine 334, which is located between the kinase domain and the C-terminal regulatory domain, may serve as a switch for MAPKAPK2 nuclear import and export. Phosphorylated MAPKAPK2 masks the nuclear localization signal at its C terminus by binding to p38. It unmasks the nuclear export signal, which is part of the second C-terminal helix packed along the surface of kinase domain C-lobe, and thereby carries p38 to the cytoplasm.

  • Organizational Affiliation

    Vertex Pharmaceuticals Inc., Cambridge, Massachusetts 02139, USA. wuyi_meng@vpharm.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MAP Kinase Activated Protein Kinase 2
A, B
400Homo sapiensMutation(s): 0 
EC: 2.7.1
UniProt & NIH Common Fund Data Resources
Find proteins for P49137 (Homo sapiens)
Explore P49137 
Go to UniProtKB:  P49137
PHAROS:  P49137
GTEx:  ENSG00000162889 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49137
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on HG

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth B],
K [auth B],
L [auth B],
M [auth B],
N [auth B],
O [auth B],
P [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 143.944α = 90
b = 143.944β = 90
c = 90.273γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-18
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 1.4: 2018-07-04
    Changes: Advisory, Data collection, Derived calculations
  • Version 1.5: 2019-11-20
    Changes: Advisory, Derived calculations
  • Version 1.6: 2024-02-14
    Changes: Data collection, Database references, Derived calculations